SU575454A1 - Pulsed detonation combustion chamber - Google Patents

Description

one

The invention relates to detonation combustion chambers and can be used, for example, in the field of light engineering and chemistry of high-temperature reactions.

A pulsed detonation combustion chamber is known, consisting of a pre-chamber with cooled fuel supply and oxygen sensors, a chamber with oxygenated fuel and oxide heating components, an adapter, a connecting chamber with a camera, and a igniter with synchronization system Clj.

This device has the disadvantage that in it the temperature and pressure of the combustion products cannot be higher than the temperature and pressure in the detonation wave front. This causes a low camera efficiency.

A device dp for pulsio combustion is known, which contains a sequential pre-chamber and a combustion chamber with a fuel manifold connected by an outlet nozzle to a receiver. The collector is connected to the combustion chamber by means of a coaxially split spindle made by the vessel. There are ecrrodes 2 between the nozzle and the collector,

This device allows to obtain the temperature of the combustion products, exceeding the temperature of 4 of the detonation wave

However, this device has the disadvantage that raising the temperature of the combustion products occurs due to the supply of electrical energy from an outside source.

Also known is a pulsed detonation combustion chamber containing a prechamber with cooled fuel and oxidant intake manifolds and a ignition device, an adapter and a combustion chamber having autonomous fuel injection unit and oxygen window and central bodies located therein;

This chamber allows to increase the temperature and pressure of the combustion products without the supply of energy, from an external source,

Claims (1)

However, this device has the disadvantage that areas of increase in the parameters of detonation nponjKTQB are at a pause rate of 2-3 1 splines from each other, as a result of which the contribution of these areas with increased parameters is not as good as high-energy fuels, e.g. acetylene, having a predetonation portion of the caliber & a caliber. When using low-energy fuels, such as methane, nonmembers, a predetonation portion of the order of several calibers, the distance between the central MJJ of the body MI increases, and consequently, the frequency of shifts of detonation waves per travel time of OTBepcriiH caldars in ring-shaped partitions should be no less than the limiting diameter in which the detonation mode of this srci may exist. This, in turn, imposes a limit on the degree of increase in temperature and pressure of combustion products. The aim of the invention is to increase the efficiency of a pulse detonation combustion chamber.% The goal is achieved by the central bodies being divided by a series of discs having central holes, b 1.20 - 0.75d. is, .r. -0.8-0.6dH where cJ l is the diameter of the disk, cjT „is the largest diameter of the central body, cf., Is the internal diameter of the combustion chamber, The drawing shows a diagram of the pulsed detonation chamber, combustion The device with the hold. ; $ soddek1 rry fuel 1 and oxidant.; 2.krkamyo {31 1}: - connected to the prechamber 3, –B Early.-forka-me. pY-nah igniting device 4 Using adapter 5 the prechamber is connected to the combustion chamber 6, Fuel and oxidant enter the combustion chamber through manifolds 7 and 8. Central bodies 9 are installed along the chamber axis, separated by a series of disks 10, km & The device operates as follows. Fuel and oxidizer according to. the collectors enter the prechamber supplied with the ignition device with the synchronization system of its operation, and the combustion chamber Fuel consumption is selected so that the full filling of the prechamber chamber and the chamber ends at the same time. the detonation and initiating detonation wave ignites the mixture in the chamber. Spreading over the chamber, the detonation front flows around the center of the gepo, receives a lance uyufermu parted and n is in the form dapshe koptsevoy detonation, and along with the movement along the axis of the chamber undergoes detonation in prsnmezhutkah convergence between the discs. In this case, an increase in temperature and pressure occurs where T and P are temperature and pressure, k is an indicator depending on the detonation mixture, d. and d diameters of the Dask and the holes in it, and the indices with X and n refer to the final and the initial gas at convergence. Additional heating and compression occur due to the conversion of the kinetic energy of the gas flow into its enthalpy. The holes in the disks serve to better empty the cavity between the disks from the combustion products and to achieve the required increase in temperature and pressure of the detonation wave. Zeitral bodies and discs can be discharged in various shapes, for example, discs can be flat and convex, and central bodies can be made in the form of a ball or a cone. After the combustion of the topirian mixtures, the products of combustion are removed: from gunners and combustion chambers: fresh Components of the combustible mixture and after filling the pulse detonation, the combustion chambers with the combustible mixture are repeated. In this way, the predicted device allows an increase in the number of areas with elevated parameters of combustion products per unit length and ultimately increase the efficiency of a pulsed detonation combustion chamber. Claims An impulse detonation combustor comprising a prechamber with cooled fuel and oxidant intake manifolds and a ignition device, an adapter and a combustion chamber having autonomous cooled fuel inlet and oxidant collectors and located in it, the main body, in order to increase the efficiency, the central bodies are separated by a series of disks having central holes, with d 1,2O 0, 75d, p, ad, 0.8 - 0.6cJ of the diameter of the disk, d ,, „the largest diameter of the central body, the inner diameter ka combustion measures Sources of information taken into account during the examination; 1, USSR Copyright Certificate N9 492193, cl, F 231 1/12, 1975. 2, USSR Copyright Certificate f9 482594, cl. R23Tg1 / 12, 1975. 3, Application H) 1995969/25, cl, R23Tg 1/12 , 1974, according to which a positive decision was made to issue an author's certificate. ech |